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User terminal, wireless base station, and wireless communication method

A technology for user terminals and control information, applied in wireless communication, error correction/detection using linear codes, signaling distribution, etc.

Active Publication Date: 2022-04-05
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Rel.13LTE, the carrier aggregation (LAA: License-Assisted Access) between the licensed band and the unlicensed band is taken as the research object, but in the future, the dual connection or the independence of the unlicensed band ( Stand-alone) may also become a research object

Method used

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  • User terminal, wireless base station, and wireless communication method
  • User terminal, wireless base station, and wireless communication method
  • User terminal, wireless base station, and wireless communication method

Examples

Experimental program
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Embodiment Construction

[0030] figure 1 It is an explanatory diagram of carrier aggregation (CA). Such as figure 1 As shown, in CA up to LTE Rel.12, a maximum of five component carriers (CCs) (CC #1 to CC #5) are bundled with the system band of LTE Rel.8 as a unit. That is, in carrier aggregation up to LTE Rel.12, the number of CCs that can be configured for each user terminal (UE: User Equipment) is limited to a maximum of five.

[0031] On the other hand, in carrier aggregation after LTE Rel.13, it is being studied to bundle six or more CCs to achieve further bandwidth expansion. That is, in the carrier aggregation of LTE Rel.13, it is studied to expand the number of CCs that can be configured for each user terminal to six or more (CA enhancement). For example, if figure 1 As shown, in the case of bundling 32 CCs (CC#1 to CC#32), a maximum bandwidth of 640 MHz can be secured.

[0032] In this way, by expanding the number of CCs that can be configured for each user terminal, it is expected to r...

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Abstract

Even when the number of component carriers that can be configured for a user terminal is increased, the uplink control signal is appropriately transmitted. A user terminal, comprising: a receiving unit for receiving a DL signal; a sending unit for sending UL control information including a delivery acknowledgment signal for the DL signal; and a control unit for controlling the sending of the UL control information, the control The unit uses the PUCCH format to control the transmission of the UL control information. The PUCCH format applies a cyclic offset to the first symbol used for the reference signal for demodulation, and does not apply an orthogonal code to the second symbol or is smaller than the current Orthogonal codes are applied to the sequence length of the sequence length used in some PUCCH format 3.

Description

technical field [0001] The present invention relates to a user terminal, a wireless base station and a wireless communication method in the next generation mobile communication system. Background technique [0002] In a UMTS (Universal Mobile Telecommunications System) network, Long Term Evolution (LTE: Long Term Evolution) has become a standard for further high-speed data rate, low delay, and the like (Non-Patent Document 1). And as 10-12 becomes the norm. [0003] The system band of LTE Rel.10-12 includes at least one component carrier (CC: Component Carrier) with the system band of the LTE system as a unit. In this way, the technique of aggregating a plurality of CCs to widen the bandwidth is called Carrier Aggregation (CA: Carrier Aggregation). [0004] In addition, in LTE of Rel. 8 to 12, it is assumed that an exclusive operation is performed in a frequency band licensed to a carrier, that is, in a licensed band, and specifications are made. As the authorized band, f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04
CPCH04W72/04H04L5/0051H04L5/0055H04L5/001H04W72/20H03M13/15H04L1/1812H04L1/1861
Inventor 武田一树内野彻永田聪
Owner NTT DOCOMO INC